This is a simple electronic mosquito repellent circuit which produces ultrasound of frequency 20-38 kHz and scare away mosquitoes from home. The basic idea behind developing the circuit is to use a ...

Output devices such as motors, solenoids, bulbs, buzzers, relays, LEDs, and 7-segment displays are used in many electronic circuits. Circuit diagrams illustrate how these devices are connected and ...

Flying to a malarial zone but forgotten to bring your tablets? Hate the thought of having to apply repellent every evening and sleep under a bed net? Just relax in your airline seat with a drink and ...